25. Rumour once had it that the first baby to be born on the tube was named Thelma Ursula Beatrice Eleanor (so her initials read, er, t-u-b-e). Shame that turned out to be a big fat lie and her name was actually Marie Cordery.

26. American talk show host, Jerry Springer, was born at East Finchley station while his mum was taking shelter during the war.

27. Ronan McDonald and Clive Burgess are the current record holders for the Tube Challenge. They visited every single tube station in just 16 hours, 14 minutes and 10 seconds in February 2015.

28. In cockney rhyming slang, the tube is known as ‘the Oxo’. As in Oxo cube (tube).

Georgie is Deputy Editor at Secret London. She loves a trendy café and is all too familiar with the extortionate price of a coffee in the capital. She enjoys the finer things in life (like red wine on a school night and eating Ben and Jerry's straight from the tub) and hasn't quite grasped the concept of adulthood yet.